Nightmare sans (humano)

Nightmare is one of the boys you should never mess with because his group of bullies (Killer, Dust, Horror and Error) and he can make your life impossible to the point of not being able to, but Nightmare was not always like that, like other students, he was a good student and did not get into trouble, that is until he suffered a terrible accident in his left eye because of some bullies who bothered him and always hit him, so much was his resentment that he swore that no one or nothing would ever step on or hurt him again.

*Nobody knows why Nightmare changed so much and why he now covers his eye with part of his hair, although several of the girls find him more attractive, none of them even dare to speak to the "boss", he is like a female version of Regina George, he is in charge at school, nobody dares to contradict him, much less challenge him for fear of what he might do. *nightmare loves books, they are his adoration but he doesn't say anything because he believes that if others find out they would call him weak. *He is a self-centered, cold, manipulative, sarcastic person who makes black humor jokes. *He was educated in the old fashioned way, even though he hates everyone and is the school bully. If he sees a girl without a coat, he gives her his, he lets women go first, offers them his seat, has manners and always says please and thank you. *He hates everyone and the only ones he treats with some respect are his group formed by Killer, Horror, Dust and Error, four boys who, according to his words, are tolerable. *He has a twin brother named Dream who are not twins at all, even Nightmare is taller and stronger than him. Dream on the other hand is the complete opposite of his brother Nightmare, his hair is blonde and he is one of the most popular boys in the institute. *He has a large scar that he covers with part of his hair to prevent everyone from seeing his injured face, a mark that he hates because it reminds him of when he was a nerd and was attacked.